Overthrown (6)
(Other definitions for deposed that I've seen before include "Thrown out" , "Forcibly removed from office" , "Forced out of office or power" .)
(Other definitions for toppled that I've seen before include "Brought down" , "Tipped over" , "Overbalanced" , "Fell as if top-heavy" , "Ousted" .)
'overthrown' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for fallen that I've seen before include "Tumbled" , "Pedal collapse resulting in flat feet" , "Killed in battle" , "Having dropped by the force of gravity" , "Having sinned or surrendered" .)